“WATCHDOG III” Flare Stack Monitoring System · Edition 01.24
EN-7
Power to Viewing Head: 24 to 26VDC, 150mA (powered from
signal processor). Fused with self-resetting fuse at 0.25A
6.4 Inputs
Manual Clear: Connect to GND via remote switch to clear
Channel Select: Connect 24VDC to select channel B
6.5 Serial Communication
RS-422/485 (Differential): 4800, 9600, 19200 or 38400 baud
(User selected)
6.6 Viewing Head
Distance from pilot: Up to 1,000ft (300 meters) line of sight
Field of view: 40ft (12 meters) Target diameter at 1,000ft (300
meters).
Cable Requirements: 4 Conductor, #22 AWG, with braided
shield. Honeywell C330S cable is recommended.
6.7 Dimensions
6.7.1 S256BE viewing head dimensions
20.25" (514 mm)
1.5"
(38 mm)
3"
(76 mm)
M33511
6.7.2 Viewing head yoke and mount dimensions
2-33/64"
(64 mm)
2"
(50 mm)
Ø 3.25" (82.6 mm)
3/4"
(19 mm)
29/32"
(23 mm)
2-13/32" (61 mm)
3-43/64"
(93 mm)
3"
(76 mm)
10-23/32" (272 mm)
M33512
1/4 Nominal" (6 mm)